JAX-WS，@ XMLJavaTypeAdapter和自定义枚举

Question

我正在使用一个基于IDL定义生成代码的库。能够在各种语言（Java，C和C ++）中使用通用枚举非常棒，但这些生成的枚举似乎与JAX-WS不相符。

基本上，主要枚举“超级”类有两个成员：序数和名称。它看起来与此类似（注意：这是在第三方库中，并且不是JavaBean友好的）：

public class CustomEnum {

    int _ordinal;
    String _name;

    public CustomEnum(int ordinal, String name) {
        this._ordinal = ordinal;
        this._name = name;
    }


    public int ordinal() {
        return _ordinal;
    }

    public String name() {
        return _name;
    }
}

那么基于IDL定义生成的代码看起来与此类似（使用Day作为示例 - 但实际上我有大约50个'枚举'来扩展CustomEnum，所以我想要一个让我保持一致的解决方案从拥有多个枚举副本，如IDL生成类型和java.lang.enum）：

public class Day extends CustomEnum {

    public static final Day Sunday = new Day(0, "Sunday");
    public static final Day Monday = new Day(1, "Monday");
    public static final Day Tuesday = new Day(2, "Tuesday");
    public static final Day Wednesday = new Day(3, "Wednesday");
    public static final Day Thursday = new Day(4, "Thursday");
    public static final Day Friday = new Day(5, "Friday");
    public static final Day Saturday = new Day(6, "Saturday");

    public Day(int ordinal, String name) {
        super(ordinal, name);
    }
}

请注意，我也不想弄乱/重新排列/注释这个类，因为它是生成代码。

所以，现在我想做的是能够在JAX-WS @WebMethod中将这个'Day'枚举用作@WebParam。这是我希望能够做的一个非常简单的例子：

import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

    @WebService
    public class EnumEndpoint {

        @WebMethod
        public boolean callEndpoint(
                @XmlJavaTypeAdapter(CustomEnumAdapter.class) Day day) {
            System.out.println(day.ordinal() + " " + day.name());
            return false;
        }

    }

我希望通过这样编写一个XmlJavaTypeAdapter：

import java.lang.reflect.Type;

import javax.xml.bind.annotation.adapters.XmlAdapter;

public class CustomEnumAdapter extends XmlAdapter<CustomEnum, EnumBean>
        implements Type {

    @Override
    public EnumBean unmarshal(CustomEnum v) throws Exception {
        EnumBean mine = new EnumBean(v.ordinal(), v.name());
        return mine;
    }

    @Override
    public CustomEnum marshal(EnumBean v) throws Exception {
        CustomEnum customEnum = new CustomEnum(v.getOrdinal(),v.getName());
        return customEnum;
    }

}

EnumBean的样子：

public class EnumBean {

    int ordinal;
    String name;

    public EnumBean(int ordinal, String name) {
        this.ordinal = ordinal;
        this.name = name;
    }

    public int getOrdinal() {
        return ordinal;
    }

    public void setOrdinal(int ordinal) {
        this.ordinal = ordinal;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

但是当我声明这样的服务器端点时：

import javax.xml.ws.Endpoint;

public class Server {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Endpoint.publish("http://0.0.0.0:7979/enum", new EnumEndpoint());

    }

}

我收到此错误：

Jun 10, 2012 3:29:21 PM com.sun.xml.internal.ws.model.RuntimeModeler getRequestWrapperClass
INFO: Dynamically creating request wrapper Class test.jaxws.CallEndpoint
Exception in thread "main" javax.xml.ws.WebServiceException: java.lang.IllegalArgumentException: value class test.CustomEnumAdapter
    at com.sun.xml.internal.ws.model.WrapperBeanGenerator.createRequestWrapperBean(WrapperBeanGenerator.java:249)
    at com.sun.xml.internal.ws.model.RuntimeModeler.getRequestWrapperClass(RuntimeModeler.java:280)
    at com.sun.xml.internal.ws.model.RuntimeModeler.processDocWrappedMethod(RuntimeModeler.java:674)
    at com.sun.xml.internal.ws.model.RuntimeModeler.processMethod(RuntimeModeler.java:612)
    at com.sun.xml.internal.ws.model.RuntimeModeler.processClass(RuntimeModeler.java:401)
    at com.sun.xml.internal.ws.model.RuntimeModeler.buildRuntimeModel(RuntimeModeler.java:240)
    at com.sun.xml.internal.ws.server.EndpointFactory.createSEIModel(EndpointFactory.java:312)
    at com.sun.xml.internal.ws.server.EndpointFactory.createEndpoint(EndpointFactory.java:178)
    at com.sun.xml.internal.ws.api.server.WSEndpoint.create(WSEndpoint.java:456)
    at com.sun.xml.internal.ws.api.server.WSEndpoint.create(WSEndpoint.java:475)
    at com.sun.xml.internal.ws.transport.http.server.EndpointImpl.createEndpoint(EndpointImpl.java:213)
    at com.sun.xml.internal.ws.transport.http.server.EndpointImpl.publish(EndpointImpl.java:143)
    at com.sun.xml.internal.ws.spi.ProviderImpl.createAndPublishEndpoint(ProviderImpl.java:102)
    at javax.xml.ws.Endpoint.publish(Endpoint.java:170)
    at test.Server.main(Server.java:11)
Caused by: java.lang.IllegalArgumentException: value class test.CustomEnumAdapter
    at com.sun.xml.internal.ws.org.objectweb.asm.ClassWriter.newConstItem(ClassWriter.java:893)
    at com.sun.xml.internal.ws.org.objectweb.asm.AnnotationWriter.visit(AnnotationWriter.java:185)
    at com.sun.xml.internal.ws.model.WrapperBeanGenerator.createBeanImage(WrapperBeanGenerator.java:111)
    at com.sun.xml.internal.ws.model.WrapperBeanGenerator.createRequestWrapperBean(WrapperBeanGenerator.java:245)
    ... 14 more

我在这里缺少什么？我试图直接使用'Day'，但由于它没有默认构造函数并且没有得到/设置友好，这也不起作用。有什么提示吗？

Answer 1

<强> EnumBean

如果EnumBean是改编的类，那么它需要有一个默认的构造函数。

package forum10972195;

public class EnumBean {

    int ordinal;
    String name;

    public EnumBean() {

    }

    public EnumBean(int ordinal, String name) {
        this.ordinal = ordinal;
        this.name = name;
    }

    public int getOrdinal() {
        return ordinal;
    }

    public void setOrdinal(int ordinal) {
        this.ordinal = ordinal;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

<强> CustomEnumAdapter

在扩展XmlAdapter时，改编的类应该作为第一个参数出现。由于您要映射到的参数是Day类型，因此您需要将XmlAdapter指定为Day作为绑定类型。

package forum10972195;

import javax.xml.bind.annotation.adapters.XmlAdapter;

public class CustomEnumAdapter extends XmlAdapter<EnumBean, Day> {

    @Override
    public EnumBean marshal(Day v) throws Exception {
        EnumBean mine = new EnumBean(v.ordinal(), v.name());
        return mine;
    }

    @Override
    public Day unmarshal(EnumBean v) throws Exception {
        Day day = new Day(v.getOrdinal(),v.getName());
        return day;
    }

}

---

测试客户

根据我建议的更改，我在WebLogic 12.1.1中运行了您的服务，并且使用内置测试客户端，我得到了以下内容：

服务请求

<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
  <env:Header />
    <env:Body>
    <callEndpoint xmlns="http://forum10972195/">
      <!--Optional:-->
      <arg0 xmlns="">
        <!--Optional:-->
        <name>string</name>
        <ordinal>3</ordinal>
      </arg0>
    </callEndpoint>
  </env:Body>
</env:Envelope>

服务响应

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
    <S:Body>
    <ns0:callEndpointResponse xmlns:ns0="http://forum10972195/">
      <return>false</return>
    </ns0:callEndpointResponse>
  </S:Body>
</S:Envelope>

Answer 2

由于你的webmethod参数上的@XmlJavaTypeAdapter注释，它在运行时失败了 - 如何在请求包装器中包装请求参数Day和包装器消息类型中的布尔响应，只需将其声明为@XmlRootElement并声明您的适配器@XmlJavaTypeAdapter(CustomEnumAdapter.class)。这样，您的@Webservice声明就没有@XmlJavaTypeAdapter注释。